CVE-2018-20858

FAUCET Score

CVE-2018-20858 describes a Cross-Site Scripting (XSS) vulnerability in edX Recommender software released before July 18, 2018. This medium-severity vulnerability (CVSS 6.1) can be exploited remotely with low attack complexity, requiring user interaction, and could lead to low impact on confidentiality and integrity. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

Vendor	Product	Version(s)	CPE
		< 1.3.1CPE matchmatch criteria	cpe:2.3:a:edx:recommender::::::::

CVSS Data

CVSS version used by this source: 3.0

6.1MEDIUM

CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality Impact

LOW

Integrity Impact

LOW

Availability Impact

NONE

Exploitability Score

2.8

Impact Score

2.7

CvssVersion

3.0

Exploit Intelligence

EPSS Score

0.85%

Probability of exploitation in next 30 days

EPSS Percentile

54.6%

Percentile rank of EPSS score among Peer Group

As of 2026-07-25

Model: v2026.06.15

This CVE's current EPSS score of 0.0086 is in the 64th percentile among its peer group of 26,209 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference

View patch

pippatch availablevia ghsa

Product: recommender-xblockFixed in: 1.3.1

Vendor Advisories (1)

pipGHSA-3j5x-7ccf-ppgmmedium

Cross-site scripting in recommender-xblock

Aug 21, 2019

References

github.com / edx/RecommenderXBlock/pull/2

PatchThird Party Advisory

groups.google.com / forum